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  • C#利用SharpZipLib解压或压缩文件夹实例操作

    最近要做一个项目涉及到C#中压缩与解压缩的问题的解决方法,大家分享。
    这里主要解决文件夹包含文件夹的解压缩问题。
    1)下载SharpZipLib.dll,在http://www.icsharpcode.net/OpenSource/SharpZipLib/Download.aspx中 有最新免费版本,“Assemblies for .NET 1.1, .NET 2.0, .NET CF 1.0, .NET CF 2.0: Download [297 KB] ”点击Download可以下载,解压后里边有好多文件夹,因为不同的版本,我用的FW2.0。
    2)引用SharpZipLib.dll,在项目中点击项目右键-->添加引用-->浏览,找到要添加的DLL-->确认
    3)改写了文件压缩和解压缩的两个类,新建两个类名字为ZipFloClass.cs,UnZipFloClass.cs

    压缩文件夹

    源码如下
    using System;
    using System.Data;
    using System.Configuration;
    using System.Web;
    using System.Web.Security;
    using System.Web.UI;

    using System.IO;

    using ICSharpCode.SharpZipLib.Checksums;
    using ICSharpCode.SharpZipLib.Zip;
    using ICSharpCode.SharpZipLib.GZip;

    /// <summary>
    /// ZipFloClass 的摘要说明
    /// </summary>
    p lic class ZipFloClass
    {
        p lic void ZipFile(string strFile, string strZip)
        {
            if (strFile[strFile.Length - 1] != Path.DirectorySeparatorChar)
                strFile += Path.DirectorySeparatorChar;
            ZipOutputStream s = new ZipOutputStream(File.Create(strZip));
            s.SetLevel(6); // 0 - store only to 9 - means best compression
            zip(strFile, s, strFile);
            s.Finish();
            s.Close();
        }


        private void zip(string strFile, ZipOutputStream s, string staticFile)
        {
            if (strFile[strFile.Length - 1] != Path.DirectorySeparatorChar) strFile += Path.DirectorySeparatorChar;
            Crc32 crc = new Crc32();
            string[] filenames = Directory.GetFileSystemEntries(strFile);
            foreach (string file in filenames)
            {

                if (Directory.Exists(file))
                {
                    zip(file, s, staticFile);
                }

                else // 否则直接压缩文件
                {
                    //打开压缩文件
                    FileStream fs = File.OpenRead(file);

                    byte[] b?r = new byte[fs.Length];
                    fs.Read(b?r, 0, b?r.Length);
                    string tempfile = file.S string(staticFile.LastIndexOf("\") + 1);
                    ZipEntry entry = new ZipEntry(tempfile);

                    entry.DateTime = DateTime.Now;
                    entry.Size = fs.Length;
                    fs.Close();
                    crc.Reset();
                    crc.Update(b?r);
                    entry.Crc = crc.Val;
                    s.PutNextEntry(entry);

                    s.Write(b?r, 0, b?r.Length);
                }
            }
        }

    }

    解压文件夹

    using System;
    using System.Data;
    using System.Web;
    using System.Text;
    using System.Collections;
    using System.IO;
    using System.Diagnostics;
    using System.Runtime.Serialization.Formatters.Binary;

    using ICSharpCode.SharpZipLib.BZip2;
    using ICSharpCode.SharpZipLib.Zip;
    using ICSharpCode.SharpZipLib.Zip.Compression;
    using ICSharpCode.SharpZipLib.Zip.Compression.Streams;
    using ICSharpCode.SharpZipLib.GZip;
    using ICSharpCode.SharpZipLib.Checksums;

    /// <summary>
    /// UnZipFloClass 的摘要说明
    /// </summary>
    p lic class UnZipFloClass
    {

        p lic string unZipFile(string TargetFile, string fileDir)
        {
            string rootFile = " ";
            try
            {
                //读取压缩文件(zip文件),准备解压缩
                ZipInputStream s = new ZipInputStream(File.OpenRead(TargetFile.Trim()));
                ZipEntry theEntry;
                string path = fileDir;                  
                //解压出来的文件保存的路径

                string rootDir = " ";                       
                //根目录下的第一个子文件夹的名称
                while ((theEntry = s.GetNextEntry()) != null)
                {
                    rootDir = Path.GetDirectoryName(theEntry.Name);                         
                    //得到根目录下的第一级子文件夹的名称
                    if (rootDir.IndexOf("\") >= 0)
                    {
                        rootDir = rootDir.S string(0, rootDir.IndexOf("\") + 1);
                    }
                    string dir = Path.GetDirectoryName(theEntry.Name);                   
                    //根目录下的第一级子文件夹的下的文件夹的名称
                    string fileName = Path.GetFileName(theEntry.Name);                   
                    //根目录下的文件名称
                    if (dir != " " )                                                       
                        //创建根目录下的子文件夹,不限制级别
                    {
                        if (!Directory.Exists(fileDir + "\" + dir))
                        {
                            path = fileDir + "\" + dir;                                               
                            //在指定的路径创建文件夹
                            Directory.CreateDirectory(path);
                        }
                    }
                    else if (dir == " " && fileName != "")                                             
                        //根目录下的文件
                    {
                        path = fileDir;
                        rootFile = fileName;
                    }
                    else if (dir != " " && fileName != "")                                             
                        //根目录下的第一级子文件夹下的文件
                    {
                        if (dir.IndexOf("\") > 0)                                                           
                            //指定文件保存的路径
                        {
                            path = fileDir + "\" + dir;
                        }
                    }

                    if (dir == rootDir)                                                                                 
                        //判断是不是需要保存在根目录下的文件
                    {
                        path = fileDir + "\" + rootDir;
                    }

                    //以下为解压缩zip文件的基本步骤
                    //基本思路就是遍历压缩文件里的所有文件,创建一个相同的文件。
                    if (fileName != String.Empty)
                    {
                        FileStream streamWriter = File.Create(path + "\" + fileName);

                        int size = 2048;
                        byte[] data = new byte[2048];
                        while (tr)
                        {
                            size = s.Read(data, 0, data.Length);
                            if (size > 0)
                            {
                                streamWriter.Write(data, 0, size);
                            }
                            else
                            {
                                break;
                            }
                        }

                        streamWriter.Close();
                    }
                }
                s.Close();

                return rootFile;
            }
            catch (Exception ex)
            {
                return "1; " + ex.Message;
            }
        }  
    }

    引用,新建一个页面,添加两个按钮,为按钮添加Click事件

    源码如下
     protected void Button1_Click(object sender, EventArgs e)
        {
            string[] FileProperties = new string[2];
            FileProperties[0] = "D:\unzipped\";//待压缩文件目录
            FileProperties[1] = "D:\zip\a.zip";  //压缩后的目标文件
            ZipFloClass Zc = new ZipFloClass();
            Zc.ZipFile(FileProperties[0], FileProperties[1]);

        }
        protected void Button2_Click(object sender, EventArgs e)
        {
            string[] FileProperties = new string[2];
            FileProperties[0] = "D:\zip\b.zip";//待解压的文件
            FileProperties[1] = "D:\unzipped\";//解压后放置的目标目录
            UnZipFloClass UnZc = new UnZipFloClass();
            UnZc.unZipFile(FileProperties[0], FileProperties[1]);
        }

    5)一切OK,可以测试一下,我是可以运行的

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  • 原文地址:https://www.cnblogs.com/diandianxinghen/p/3578719.html
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